(х2 +17)(х-6)(х+2)<0

х2-это х в квадрате 

прямоугольник разрезали на три прямоугольника, два из которых имеют размеры 5*11 и 4*6. какие размерымог иметь третий прямоугольник (найдите все возможности)

ЗАДАЧА ГРАФИЧЕСКИМ МЕТОДОМ. 4-класс. КАКОЕ ЧИСЛО НА 4215 БОЛЬШЕ СВОЕЙ ЧЕТВЕРТИ?

1) Choose the correct iteam.

1.  .... wanted to go there? a)Why   b)Who   c)When
2.  He is going .... the poem. a)learn   b)learns   c)to learn

3.  - Who wants to dance?

     - The girls .... . a)do   b)wants   c)want

4. It is .... beautiful room in the house. a)more   b)most   c)the most

5. Who .... history?  a)does study   b)do study   c)studies

6. Michael looks older .... his friend. a)than   b)then   c)-

7. .... have got a dog. a)Orlovs   b)The Orlovs'   c)The Orlovs

8. Is she in .... first form? a)a   b)the   c)-

9. Granny .... make cakes every day. a)don't   b)isn't   c)doesn't

10. Once there lived .... funny elephant. a)a   b)an   c)the

2) Fill in 'S or S'.

1. The sportsmen... bags are in the room.

2. I have got a friend. My friend... uncle works in London.

3. I have got two friends. My friend... parents work in Moscow.

4. Mary isn't Mr Smith... sister.

5. Sport is the Smith... dog.

3) Write a tag for each sentence.

1. We have got a lot of juice, .....................................................?

2. You can't go there, ................................................?

3. There is some apple juice, ..........................................?

4. It is an apple, ......................................?

5. The apples were nise, ..................................?

молекулярные , полные и сокращенные ионные уравнения соответствующих реакций

Cu(OH)2+H2SO4=

NaOH+H2SO4=